/Engine/Source/Runtime/MovieScene/Public/MovieSceneSequence.h
Sequences can determine whether they support a particular track type
virtual ETrackSupport IsTrackSupported ( [TSubclassOf](API\Runtime\CoreUObject\Templates\TSubclassOf)< [UMovieSceneTrack](API\Runtime\MovieScene\UMovieSceneTrack) > InTrackClass ) const